Chuck



G. REISINGER.

CHUCK.

APPLICATION FILED MAR. 12, 1919.

Patented Aug. 3, 1920.

0 lllllllln- INVENTOR.

% ATTORNEYS PATENT OFFICE.

UNITED STATES" GEORGE REISINGER, OF ROCHESTER, NEW YORK.

-CHUCK.

Specification of Letters Patent.

Patented Au". 3, 1920.

Application filed March 12, 1919. Serial No. 282,232.

new and useful Improvements in Chucks,

of which the following 'is a specificat on.

The present invention relates to chucks and more particularly to thetype designed for use in lathes in which the chuck is supported upon ahollow spindle, an object of this invention being to provide a chuckwhich may be converted at will into an internal or external chuck sothat the clamping jaws may be utilized for engaging the exterior or theinterior of a work piece.

' To this and other ends, the invention concombinations of sists'ofcertain parts and parts all of which will be hereinafter described, thenovel features beingpointed out in the appended claims.

Inthe drawings: 7 Figure 1 is a longitudinal section of the chuckadjusted for internal clamping and taken on the line 1-1 of Fig. 3; 1

Fig. 2 is a similar view but showing the chuck adjusted for externalclamping;

' Fig. 3 shows the chuck associated with the spindle and the operatingmember, the

operating member and the spindle being in section while the chuck is inside elevation;

Figs. 1 and 5 are detail views 0 bevel ring which efiects theoperation'of the jaws for internal clamping Fig. (Sis an end view of theouter sleeve member as seen from to- Fig. 1;

Fig. 7 is an endview of the jaw carrying sleeve as seen from the leftwith respect to Fig. 25

- Fig. Sis an end view of the chucklooking i from the outer end thereof;and

is provided in order that Fig. 9 is 'a' side view of the spindle withthe chuck in position therein.

The chuck embodies a plurality of jaws 1 formed with external clampingsurfaces for engaging the interior of a work piece 3 and also'formedwith internal gripping surj the exterior of a work' this instance, are Yarms 6 made faces 4 for engaging piece 5. Thesejaws in formed integrallywith spring byslitting a hollow member or collet 7 which the rod orotherwork piece to be clamped exteriorly, may be extended therein. The hollowmember or collet 7 is'supported in one end of a spindle of the jawcarrying split collet 7 ing the jaws away f the sleeve 10 may the rightwith respect beveled face 17 on with the set of beveled faces 15 onthejaws 2 wardly to its e and the jaws in order to provide a space 12 mwhich the jaws may operate.

The collet 7 1s adapted to move axially in the sleeve 10 for the purposeof expanding or contractingthe clamp as will be'hereinafter moreparticularly set forth. The axial movement may be eifected' in anysuitable manner as by a hollow operating rod 13 rotatably mounted in thespindle 8 and having a screw threaded connection 14 with the jawcarrying member? so as to produce the axial movement of the jaw carryingmember. v

To the end that the chuck may be expanded and contracted the jaws may beprovided with two sets of beveled or cam faces,

one set, indicated at 15, being employed for forcing the jaws togetherto make the'jaws clamp a work piece'exteriorly and the other setindicated at 16 being employed for movfrom each other to make the jawsclamp a work piece interiorly. For cooperation with the beveled faces 15the be provided at its outer end with a tapered, beveled or cam portion17 and to cooperate with the beveled faces 16 on the clamping jaws,there may be provided a beveled or cam face 18 on a ring 19 which turnson the cylindrical portion 20 formed on the sleeve 10. This ring whenmoved inwardly to one limit permits the the'sleeve 10 to co'ciperatewhen the jaw carrying sleeve is moved inwardly, and, when the ring 19 ismoved outother limit as shown in Fig, 1 the sleeve 10, the beveled toproject beyond cooperate with the face 18 on'the ring'will 7 set ofbeveled faces 16 on the jaws and move the jaws outwardly.

'With the purpose in the position of the ring I vided on its inner facewith a plurality of lugs or projections 21 adapted to cooperate in oneposition with an abutment or annular shoulder22 formed on the sleeve 10.This view of determining 19, the latter is proabutment or annularshoulder is provided with a number of notches or recesses 23corresponding to the" number of lugs 21 and adapted to receive said lugswhen the rings. 19 is shifted so that the face of the ring may directlyengage with the abutment 22. When 7 the lugs engage the abutment thering is projected beyond the end of the sleeve 10 as shown in Fig. 1whereas when the lugs enter 10 the recesses 23, the end of the sleeve 10is projected beyond the end of the ring as shown in Fig. 2. j

VVhen theoperator of the chuck desires to clamp a work piece interiorly, the ring 19 is turned to the position shown in Fig. 1

- after which the operating rod 13 is turned there has been providedwhich the jaws are formed with t'wo'sets of work piece, 'and the other:justed to the position shown in Fig. 2 so that,x-when the jaw'carryingmember 1? is moved inwardly through the rod-13, the faces 15 and 17 willengage and force the jaws inwardly upon the work piece 5; r From theforegoing it will beseen that a lathe chuck in faces, one set forengagingthe'exterior of a set for engaging the lnterior of a work piece;

I are controlled by two devicesselectable at v will, one. for moving thejawsinwardly'to 7 i vices selectable terror of a work causethe faces toengage the exterior of a workpieceand the other for'moving the jawsoutwardly to cause them to engage the 111- terior ofa work piece; These,devices are so constructed that the selecting operation is simple,permitting the chuck to be readily changed from one form of clamp tothe-other form. The structure as a'whole is strong and durable and isnot liable to: get outof order. V V 1 f What I claim as my invention anddesire to secure by Letters Patent is:

1."A lathe chuck comprising a collet having spring jaws formed withclamping faces for engaging the exterior of awork piece and alsowithclamping faces for engaging the interior oft-a work piece, and twodeatwill, one for moving'the spring jaws outwardly to engage thempieceand. the other for moving the spring aws inwardly for en gaging theexteriorof a work piece';

1 2'. A lathe chuck'compris'ing a hollow lathe 'spindle,. a collet thespindle and having the spindle for '00- clamp the work.

atively adjustable lectable at will, one

These jaws movable axiallyof: jaws formed with internal and. externalgripping faces," and devices mounted onoperating with the collet for'forcing' the J jaws outwardly or inwardly to cause eitheri I the outeror the inner gripping faces to 3. A lathe chuck comprising an externallytapered sleeve, a collet movable axially in the sleeve and having jawsformed with external and internal gripping faces, and reldevices mountedon the externally tapered sleeve and adapted to cooperate at will withsaid jaws when the collet is moved axially;

said cooperation effecting the movement of the jaws outwardly orinwardly to cause either theouter or the inner gripping faces to clampthe work.

4;. A lathe chuck comprising .an externally tapered sleeve, a colletmovableaxially in the sleeve and having jaws formed with internal andexternal gripping faces, a surface. on said sleeve adapted to cooperatewith said jaws to move them in one direction, and a ring adjustable onsaid externally tapered sleeve to cooperate with the jaws to move themi'n the other direction.

5..A lathe chuck comprising a hollow lathe spindle, a collet movableaxially of the spindle and carrying jaws having internal and externalgripping fac'es, and two'devices carried by the hollow spindle and seofsaid devices cooperating with the jaws for moving the jaws outwardlyfor-internal gripping and the other of said devices for cooperating withthe jaws to move them, inwardly for external gripping. V m V 6. A lathechuckcomprising a hollowlathe; spindle, a collet movable axially of saidspindle and having jaws formed with internal and externalgrippingfaces', said collet alsoyhaving two sets of 'cam' faces thereon,and two devices selectable at will, each for cooperatingwith one of saidcam faces on the collet, one of said devices acting to move the jawsoutwardly for internal gripping and the other of said devices acting tomove the jaws inwardly for external gripping. g V

7..,A lathe chuck comprising a hollow rotary lathe spindle having itsinner wall tapered at one end, an externally tapered sleeve fitted in.tl'e tapered end of the lathe spindle, a collet having jaws formed withinternal and external gripping faces and movable axially'in said sleeve,said collet having two sets of cam faces thereon, one ofwhich'is adaptedto cooperate with the externally taperedjsleeve to move the jawsinwardly for external gripping, and a ring mounted upon the externallytapered sleeve and movable to cooperate with the otherset of camfaces onthe jaws for the purpose of moving said jaws outwardly for internalgripping. j r

8. A lathe chuck comprising an externally tapered sleeve, a'collet splitto provide a plurality of spring jaws formed with internal and externalgripping faces, s'aid'collet being-movable axiallv in the sleeve andhav- 7 mg surfaces formed on its jaws to engage having jaws formed withinternal and external gripping faces and movable axially in the sleeve,the collet having its jaws formed with surfaces which engage the sleevewhen the collet is moved axially in order to force said jaws in onedirection, and

a ring mounted upon the sleeve and provided with a plurality ofprojections adapted to lie within the recess or to cooperate with theannular abutment, said sleeve when lying in the recess being inoperativeand when cooperating with the abutment, acting on the jaws to force themin the opposite direction.

10. A lathe chuck comprising an expansible and contractible collethaving jaws formed with internal and external gripping faces, and meanscooperating interchangeably with said collet for interchan eably forcingthe jaws outwardly or inwardly by relative axial movement of said meansand collet.

11. A lathe chuck comprising an expansible and contractible collet,having jaws formed with internal and external gripping faces, saidcollet also having two sets of cam faces, and means cooperatinginterchange ably with one or the other set of said cam faces of thecollet for interchangeably forcing thejaws outwardly or inwardly byrelative axial movement of said means and collet.

12. A lathe chuck comprising an expansible and contractible collet,having jaws formed with internal and external gripping faces, and meansin constant coaxial arrangement with the collet for interchangeablyforcing the jaws outwardly or inwardly by relative axial movement ofsaid means and collet.

GEORGE REISINGER.

